Dissolution test apparatus calibration is described in General Chapter DISSOLUTION <711> but the calibration with Salicylic acid tablets USP is no longer available now because USP had withdrawn the Salicylic acid calibration part on December 01, 2009.

1. Salicylic acid tablets were non-disintegrating and uncoated tablets but practically uncoated and non-disintegrating formulations are very rare, so there was no requirement for the calibration the dissolution apparatus with the non disintegrating tablets.

2. Salicylic acid tablets are unstable and stuck together. Due to this, these tablets violates the quality of analytical standard.

Therefore the Salicylic acid tablets had withdrawned from the calibration of dissolution test apparatus.